Search found 7 matches

by "Corey Lofdahl"
Fri Jan 30, 2004 9:25 am
Forum: SD Mailing List Archive
Topic: Using Statistics in Dynamics Models
Replies: 28
Views: 20828

Using Statistics in Dynamics Models

Just to throw in three observations regarding how I used statistics in an SD study. First, having interesting statistical results helped the study be read and accepted by a wider, non-SD audience. Regardless of how much more advanced non-equilibrium simulations are than equilibrium models, the fact ...
by "Corey Lofdahl"
Mon Jun 02, 2003 11:11 am
Forum: SD Mailing List Archive
Topic: Economic-ecological interaction and models
Replies: 3
Views: 3996

Economic-ecological interaction and models

With respect to economic and ecological relationships, you might also want to check out, _Earth as Transformed by Human Action: Global and Regional Changes in the Biosphere over the Past 300 Years_. B.L. Turner II, William C. Clark, Robert W. Kates, John F. Richards, Jessica T. Mathews, and William ...
by "Corey Lofdahl"
Wed May 07, 2003 10:55 am
Forum: SD Mailing List Archive
Topic: 6 IPE challenges
Replies: 0
Views: 2429

6 IPE challenges

Paul Hoffman in _The Man Who Loved Only Numbers_ tells of itinerant Hungarian mathematician Paul Erdos who traveled from school to school to talk math with his colleagues and search out young math talent. Mathematics can be quite lonely, and Erdos helped make it more social by keeping a list of good...
by "Corey Lofdahl"
Mon Apr 21, 2003 10:13 am
Forum: SD Mailing List Archive
Topic: Can system dynamics models "learn"
Replies: 46
Views: 33406

Can system dynamics models "learn"

Thanks Paul -- I remember this talk well and am glad you gave out the URL. The key point from this talk is Richardsons definition of intelligence -- i.e., a function of pattern matching and memory. A good and useful heuristic, and a point brought home by the movie _Memento_ that features a hero with...
by "Corey Lofdahl"
Thu Oct 31, 2002 9:59 am
Forum: SD Mailing List Archive
Topic: Models of regional and national conflicts
Replies: 2
Views: 6678

Models of regional and national conflicts

Conflict has been analyzed in the SD context by Nazli Choucri using her theory of lateral pressure. Two major works stand out: Nazli Choucri and Robert C. North (1975). "Nations in Conflict: National Growth and International Violence". San Francisco: W. H. Freeman. uses systems concepts to...
by "Corey Lofdahl"
Fri Aug 09, 2002 10:31 am
Forum: SD Mailing List Archive
Topic: Books on Afghanistan and Terrorism
Replies: 4
Views: 5363

Books on Afghanistan and Terrorism

Though there are many relevant and good books, let me mention four here that get at current thinking about terrorism. As we all know, people use metaphors to help them understand new topics, and there have been three basic metaphors surrounding terrorism. 1) terrorism as a business Peter Bergen, 200...
by "Corey Lofdahl"
Thu Mar 23, 2000 1:14 pm
Forum: SD Mailing List Archive
Topic: System Dynamics: Art, Science or Profession
Replies: 19
Views: 13011

System Dynamics: Art, Science or Profession

"Whats art? Nature concentrated." --- Honore de Balzac Edward Tufte -- author of The Visual Display of Quantitative Information, Envisioning Information, and Visual Explanations - gave a leacture in Boston earlier this month. The audience was sizable, and most were there for the same reaso...